Interest rates in the USA (Fed), eurozone (ECB), UK (BoE), and Japan (BoJ). Note: Fed is the federal funds rate; ECB is the interest rate on the main refinancing operations; BoE is the Bank of England base rate; BoJ is the overnight call rate target. Sources: official websites of the U.S. Federal Reserve (https://www.federalreserve.gov/), ECB (https://www.ecb.europa.eu/), Bank of England (https://www.bankofengland.co.uk/), and Bank of Japan (https://www.boj.or.jp/en/).